Without doing any calculations, determine whether the standard entropy change, s° is positive or negative for each of the following reactions.

a. s° is positive for both reactions.
b. s° is positive for reaction 1 but negative for reaction 2.
c. s° is positive for reaction 2 but negative for reaction 1.
d. s° is negative for both reactions.

How many miles of calcium oxide will be produced when 1.6 miles of iron (iii) oxide react with calcium phosphate

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.